/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:32:40,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:32:40,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:32:40,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:32:40,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:32:40,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:32:40,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:32:40,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:32:40,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:32:40,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:32:40,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:32:40,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:32:40,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:32:40,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:32:40,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:32:40,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:32:40,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:32:40,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:32:40,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:32:40,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:32:40,407 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:32:40,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:32:40,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:32:40,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:32:40,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:32:40,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 09:32:40,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 09:32:40,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 09:32:40,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 09:32:40,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 09:32:40,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 09:32:40,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 09:32:40,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 09:32:40,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 09:32:40,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 09:32:40,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 09:32:40,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 09:32:40,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 09:32:40,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 09:32:40,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:32:40,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:32:40,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:32:40,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:32:40,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:32:40,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:32:40,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:32:40,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:32:40,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:32:40,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:32:40,444 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:32:40,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:32:40,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:32:40,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:32:40,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:32:40,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:32:40,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:32:40,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:32:40,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:32:40,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:32:40,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:32:40,447 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:32:40,447 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:32:40,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:32:40,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:32:40,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:32:40,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:32:40,658 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:32:40,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-03-20 09:32:40,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935451935/1395f0e1f52e43368e2b8cead8163a52/FLAG115547589 [2022-03-20 09:32:41,064 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:32:41,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-03-20 09:32:41,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935451935/1395f0e1f52e43368e2b8cead8163a52/FLAG115547589 [2022-03-20 09:32:41,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935451935/1395f0e1f52e43368e2b8cead8163a52 [2022-03-20 09:32:41,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:32:41,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:32:41,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:32:41,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:32:41,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:32:41,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4beb55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41, skipping insertion in model container [2022-03-20 09:32:41,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:32:41,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:32:41,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2022-03-20 09:32:41,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:32:41,657 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:32:41,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c[525,538] [2022-03-20 09:32:41,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:32:41,694 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:32:41,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41 WrapperNode [2022-03-20 09:32:41,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:32:41,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:32:41,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:32:41,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:32:41,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:32:41,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:32:41,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:32:41,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:32:41,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:41,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:32:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:41,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:32:41,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:32:41,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:32:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:32:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:32:41,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:32:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:32:41,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:32:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:32:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:32:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:32:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:32:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:32:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:32:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:32:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:32:41,858 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:32:41,859 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:32:41,994 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:32:41,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:32:41,998 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 09:32:41,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:32:41 BoogieIcfgContainer [2022-03-20 09:32:41,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:32:42,000 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:32:42,000 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:32:42,001 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:32:42,003 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:32:41" (1/1) ... [2022-03-20 09:32:42,004 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:32:42,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:32:42 BasicIcfg [2022-03-20 09:32:42,022 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:32:42,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:32:42,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:32:42,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:32:42,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:32:41" (1/4) ... [2022-03-20 09:32:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfb305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:32:42, skipping insertion in model container [2022-03-20 09:32:42,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:32:41" (2/4) ... [2022-03-20 09:32:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfb305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:32:42, skipping insertion in model container [2022-03-20 09:32:42,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:32:41" (3/4) ... [2022-03-20 09:32:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfb305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:32:42, skipping insertion in model container [2022-03-20 09:32:42,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:32:42" (4/4) ... [2022-03-20 09:32:42,029 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.cqvasr [2022-03-20 09:32:42,046 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:32:42,046 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:32:42,081 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:32:42,085 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:32:42,085 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:32:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 09:32:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 09:32:42,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:42,101 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:42,101 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-03-20 09:32:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:42,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248167571] [2022-03-20 09:32:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:42,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:32:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:32:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248167571] [2022-03-20 09:32:42,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248167571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:42,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:42,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:32:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308181365] [2022-03-20 09:32:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:42,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:32:42,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:32:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:32:42,312 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:44,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 09:32:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:44,463 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-03-20 09:32:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:32:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 09:32:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:44,469 INFO L225 Difference]: With dead ends: 70 [2022-03-20 09:32:44,469 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:32:44,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:32:44,473 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:44,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 09:32:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:32:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 09:32:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:32:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-03-20 09:32:44,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-03-20 09:32:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:44,519 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-03-20 09:32:44,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-03-20 09:32:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 09:32:44,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:44,521 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:44,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:32:44,521 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-03-20 09:32:44,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:44,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188701125] [2022-03-20 09:32:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:44,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:32:44,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730037676] [2022-03-20 09:32:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:44,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:32:44,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:32:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 09:32:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:32:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:44,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:32:44,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188701125] [2022-03-20 09:32:44,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:32:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730037676] [2022-03-20 09:32:44,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730037676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:44,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:44,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 09:32:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525142723] [2022-03-20 09:32:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:44,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 09:32:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 09:32:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:32:44,700 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:44,714 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-03-20 09:32:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 09:32:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 09:32:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:44,715 INFO L225 Difference]: With dead ends: 55 [2022-03-20 09:32:44,715 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 09:32:44,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 09:32:44,731 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:44,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:32:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 09:32:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 09:32:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:32:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-20 09:32:44,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-03-20 09:32:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:44,737 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-20 09:32:44,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-20 09:32:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 09:32:44,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:44,738 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:44,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 09:32:44,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:44,944 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-03-20 09:32:44,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:44,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191050429] [2022-03-20 09:32:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:44,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:44,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:32:44,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342764652] [2022-03-20 09:32:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:44,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:44,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:32:44,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:32:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:45,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:32:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:32:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:45,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:32:45,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:45,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191050429] [2022-03-20 09:32:45,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:32:45,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342764652] [2022-03-20 09:32:45,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342764652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:45,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:45,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:32:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019958360] [2022-03-20 09:32:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:45,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:32:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:32:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:32:45,079 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:45,105 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-20 09:32:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:32:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-20 09:32:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:45,108 INFO L225 Difference]: With dead ends: 49 [2022-03-20 09:32:45,108 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 09:32:45,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:32:45,111 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:45,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:32:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 09:32:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 09:32:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:32:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-03-20 09:32:45,116 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-03-20 09:32:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:45,116 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-03-20 09:32:45,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-03-20 09:32:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 09:32:45,117 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:45,117 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:45,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:32:45,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 09:32:45,318 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-03-20 09:32:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499686710] [2022-03-20 09:32:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:45,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:45,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:32:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:45,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:32:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:45,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499686710] [2022-03-20 09:32:45,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499686710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:45,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:45,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 09:32:45,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039134841] [2022-03-20 09:32:45,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:45,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:32:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:32:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:32:45,489 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:48,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 09:32:51,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:32:54,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:32:56,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 09:32:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:56,957 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-03-20 09:32:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:32:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-20 09:32:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:56,959 INFO L225 Difference]: With dead ends: 72 [2022-03-20 09:32:56,959 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 09:32:56,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:32:56,961 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 40 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:56,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 163 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-03-20 09:32:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 09:32:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 09:32:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 09:32:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-03-20 09:32:56,970 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-03-20 09:32:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:56,971 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-03-20 09:32:56,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-03-20 09:32:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:32:56,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:56,975 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:56,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 09:32:56,975 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-03-20 09:32:56,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671466418] [2022-03-20 09:32:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:56,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:32:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098098839] [2022-03-20 09:32:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:56,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:57,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:32:57,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:32:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:32:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:32:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:57,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:32:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671466418] [2022-03-20 09:32:57,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:32:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098098839] [2022-03-20 09:32:57,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098098839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:32:57,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:32:57,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 09:32:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95732648] [2022-03-20 09:32:57,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:32:57,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:32:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:32:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:32:57,226 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:32:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:57,255 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2022-03-20 09:32:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:32:57,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 09:32:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:57,257 INFO L225 Difference]: With dead ends: 72 [2022-03-20 09:32:57,258 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 09:32:57,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:32:57,264 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:57,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:32:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 09:32:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 09:32:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 09:32:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-03-20 09:32:57,279 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 23 [2022-03-20 09:32:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:57,279 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-03-20 09:32:57,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:32:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-03-20 09:32:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 09:32:57,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:57,280 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:57,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:32:57,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:57,481 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-03-20 09:32:57,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:57,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495321906] [2022-03-20 09:32:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:57,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:32:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560171422] [2022-03-20 09:32:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:57,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:32:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:32:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:32:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:32:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:32:57,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:32:57,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495321906] [2022-03-20 09:32:57,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:32:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560171422] [2022-03-20 09:32:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560171422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:57,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:57,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:32:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405604236] [2022-03-20 09:32:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:57,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:32:57,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:32:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:32:57,731 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:58,334 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2022-03-20 09:32:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:32:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-03-20 09:32:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:58,342 INFO L225 Difference]: With dead ends: 75 [2022-03-20 09:32:58,342 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 09:32:58,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:32:58,343 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:58,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 09:32:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 09:32:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 09:32:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 09:32:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2022-03-20 09:32:58,364 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 24 [2022-03-20 09:32:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:58,364 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2022-03-20 09:32:58,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:32:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2022-03-20 09:32:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 09:32:58,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:58,365 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:58,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 09:32:58,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:58,569 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-03-20 09:32:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183880229] [2022-03-20 09:32:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:58,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:32:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:32:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:32:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183880229] [2022-03-20 09:32:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183880229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:58,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:58,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 09:32:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096289179] [2022-03-20 09:32:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:58,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:32:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:32:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:32:58,644 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:58,867 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-03-20 09:32:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:32:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 09:32:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:58,867 INFO L225 Difference]: With dead ends: 66 [2022-03-20 09:32:58,868 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 09:32:58,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:32:58,868 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:58,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 42 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:32:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 09:32:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 09:32:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 09:32:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-03-20 09:32:58,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2022-03-20 09:32:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:58,871 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-03-20 09:32:58,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 09:32:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-03-20 09:32:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 09:32:58,872 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:32:58,872 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:58,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 09:32:58,875 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:32:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:32:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1279154140, now seen corresponding path program 1 times [2022-03-20 09:32:58,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:32:58,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979440088] [2022-03-20 09:32:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:32:58,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:32:58,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515518870] [2022-03-20 09:32:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:32:58,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:32:58,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:32:58,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:32:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:32:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:32:58,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:32:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 09:32:59,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:32:59,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:32:59,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979440088] [2022-03-20 09:32:59,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:32:59,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515518870] [2022-03-20 09:32:59,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515518870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:32:59,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:32:59,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:32:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004418744] [2022-03-20 09:32:59,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:32:59,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:32:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:32:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:32:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:32:59,039 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:32:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:32:59,092 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-20 09:32:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:32:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 09:32:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:32:59,093 INFO L225 Difference]: With dead ends: 32 [2022-03-20 09:32:59,093 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:32:59,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:32:59,094 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:32:59,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:32:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:32:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:32:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 09:32:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:32:59,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-20 09:32:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:32:59,095 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:32:59,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 09:32:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:32:59,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:32:59,097 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:32:59,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:32:59,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:32:59,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:32:59,519 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 09:32:59,519 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:32:59,520 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 20 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,520 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,520 INFO L882 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-03-20 09:32:59,520 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 35) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0)) (.cse2 (= main_~h~0 0))) (or (and .cse0 .cse1 (<= 1 ~counter~0) .cse2) (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 0 ~counter~0) .cse2 (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|)))) [2022-03-20 09:32:59,521 INFO L882 garLoopResultBuilder]: For program point L52-2(lines 20 61) no Hoare annotation was computed. [2022-03-20 09:32:59,521 INFO L882 garLoopResultBuilder]: For program point L30-1(lines 30 35) no Hoare annotation was computed. [2022-03-20 09:32:59,521 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 56) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0)) (.cse2 (= main_~h~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) .cse0 .cse1 .cse2) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 .cse1 .cse2 (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|)))) [2022-03-20 09:32:59,521 INFO L882 garLoopResultBuilder]: For program point L38(lines 38 56) no Hoare annotation was computed. [2022-03-20 09:32:59,521 INFO L882 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2022-03-20 09:32:59,521 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0))) (or (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 .cse1 (= main_~q~0 1)) (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) .cse0 .cse1 (= main_~h~0 0)) (not (<= 0 |old(~counter~0)|)))) [2022-03-20 09:32:59,521 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,521 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0))) (or (and .cse0 (= main_~h~0 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 (= main_~n~0 main_~r~0) (= main_~q~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)))) [2022-03-20 09:32:59,521 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,521 INFO L882 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L878 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 61) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L878 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 61) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L878 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,522 INFO L878 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point L44(lines 38 56) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-20 09:32:59,522 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 09:32:59,523 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-20 09:32:59,525 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:32:59,525 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:32:59,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:32:59 BasicIcfg [2022-03-20 09:32:59,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:32:59,534 INFO L158 Benchmark]: Toolchain (without parser) took 18086.98ms. Allocated memory was 173.0MB in the beginning and 227.5MB in the end (delta: 54.5MB). Free memory was 144.5MB in the beginning and 150.6MB in the end (delta: -6.1MB). Peak memory consumption was 48.0MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.11ms. Allocated memory is still 173.0MB. Free memory was 144.3MB in the beginning and 145.0MB in the end (delta: -636.8kB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: Boogie Preprocessor took 40.51ms. Allocated memory is still 173.0MB. Free memory was 145.0MB in the beginning and 143.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: RCFGBuilder took 263.73ms. Allocated memory is still 173.0MB. Free memory was 143.3MB in the beginning and 131.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: IcfgTransformer took 21.83ms. Allocated memory is still 173.0MB. Free memory was 131.1MB in the beginning and 129.3MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,535 INFO L158 Benchmark]: TraceAbstraction took 17511.24ms. Allocated memory was 173.0MB in the beginning and 227.5MB in the end (delta: 54.5MB). Free memory was 128.8MB in the beginning and 150.6MB in the end (delta: -21.8MB). Peak memory consumption was 33.7MB. Max. memory is 8.0GB. [2022-03-20 09:32:59,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 132.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 245.11ms. Allocated memory is still 173.0MB. Free memory was 144.3MB in the beginning and 145.0MB in the end (delta: -636.8kB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.51ms. Allocated memory is still 173.0MB. Free memory was 145.0MB in the beginning and 143.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 263.73ms. Allocated memory is still 173.0MB. Free memory was 143.3MB in the beginning and 131.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 21.83ms. Allocated memory is still 173.0MB. Free memory was 131.1MB in the beginning and 129.3MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 17511.24ms. Allocated memory was 173.0MB in the beginning and 227.5MB in the end (delta: 54.5MB). Free memory was 128.8MB in the beginning and 150.6MB in the end (delta: -21.8MB). Peak memory consumption was 33.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.4s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 14.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 14.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 899 SdHoareTripleChecker+Invalid, 14.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 577 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 317 IncrementalHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 322 mSDtfsCounter, 317 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 84 PreInvPairs, 99 NumberOfFragments, 495 HoareAnnotationTreeSize, 84 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 17 FomulaSimplificationsInter, 58 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 SizeOfPredicates, 7 NumberOfNonLiveVariables, 461 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 11/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((p == 0 && n == r) && 1 <= counter) && h == 0) || !(\old(counter) <= 0)) || ((((p == 0 && n == r) && 0 <= counter) && h == 0) && q == 1)) || !(0 <= \old(counter)) RESULT: Ultimate proved your program to be correct! [2022-03-20 09:32:59,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...